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Chapter 10 Usage Scenarios 10-11
Hitachi Universal Replicator for IBM /OS User’s Guide
M-VOL/Prm.
data VOL
Master
JNLVOL
Primary site
URz
Sec. data VOL
R-VOL
JNLVOL
TCz
Synchronous
TCz Synchronous
secondary site
R-VOL/Prm.
data VOL
Master
JNLVOL
M-VOL
JNLVOL
M-VOL
JNLVOL
Restore
J
NLV
O
L
R-VOL/Prm.
data VOL
Master
JNLVOL
業務
Tasks
業務Tasks
業務Tasks
Black arrow indicates copy direction.
If an arrow is solid (not dotted),
the pair is in Duplex status.
TCz
Synchronous
TCz
Synchronous
TCz Synchronous
secondary site
TCz Synchronous
secondary site
URz
URz
Primary site
Primary site
URz
secondary site
URz
secondary site
URz
secondary site
Sec. data VOL
Sec. data VOL
Restore
J
NLV
O
L
Restore
J
NLV
O
L
M-VOL: main volume
R-VOL: remote volume
Prm data VOL: primary data volume
Sec. data VOL: secondary data volume
JNLVOL:
j
ournal volume
Figure 10-2 Recovering from Failures in the Primary Site
Recovering from Failures in the Primary Site (When Delta Resync Operation is
Performed)
If a disaster or failure occurs only in the primary site in 3DC multi-target
system, you can use secondary volume in the TCz Synchronous secondary site
to enable the secondary site to take over your business tasks. After
transferring your business tasks to the secondary site, you need to remove the
failure from the primary site, so that you will be able to transfer your business
tasks back to the primary site.
To transfer your business tasks to the TCz Synchronous secondary site, follow
the procedure below. Business Continuity Manager is used in this procedure:
1. Use Business Continuity Manager to execute the YKSUSPND REVERSE
command on the TCz Synchronous pair.
TCz Synchronous pair will be split and the copy operation stops temporarily.
2. Use the TCz Synchronous remote volume to resume your business tasks.